Mars 2011: Kärnkraftverket i Fukushima - utbruten och sammanfogad tråd

Aanser du att effekten att tyngre isotoper lägger sig på botten (av vadå egentligen?) och inte läcker ut i havet, är betydelsefull?

Mina gamla kunskaper säger mig att vattenlösta atomer. molekyler och salter är jämnt koncentrerade oavsett hur tunga de är.

Om man ska späda till att utsläppet blir lika stort som är normalt i Japanska kustvatten (2mBq/L) måste man späda 45000 ggr till.

Då måste man späda med en volym som är nästan lika stor som medelhavet!

http://www.irsn.fr/FR/Actualites_presse/Actualites/Documents/IRSN-NI-Impact-accident-Fukushima-sur-milieu-marin_04042011.pdf

Stilla Havet är ju bra mycket större än så...

The monitor told NHK that no one can enter the plant's No. 1 through 3 reactor buildings because radiation levels are so high that monitoring devices have been rendered useless. He said even levels outside the buildings exceed 100 millisieverts in some places.

http://www3.nhk.or.jp/daily/english/05_38.html

IAEA skriver idag:
Currently, the IAEA monitoring team is working in the Fukushima region. On 5th April, measurements were made at 7 locations at distances of 16 to 41 km, South and South West to the Fukushima nuclear power plant. The dose rates ranged from 0.3 to 31 microsievert per hour. At the same locations, results of beta-gamma contamination measurements ranged from 0.01 to 3.2 megabecquerel per square metre. The highest dose rates and beta gamma contaminations were measured at the location closest to the Fukushima Nuclear Power Plant.

Since our written briefing of yesterday, data related to food contamination was reported on 4 April by the Japanese Ministry of Health, Labour and Welfare. These reported analytical results covered a total of 24 samples taken on 31 March (4 samples) and 1st, 3rd and 4th April (20 samples). Analytical results for all of the 24 samples for various vegetables, fruit (strawberry) and seafood in five prefectures (Gunma, Ibaraki, Niigata, Saitama and Tochigi) indicated that iodine-131, caesium-134 and/or caesium-137 were either not detected or were below the regulation values set by the Japanese authorities.

The IAEA/FAO Food Safety Assessment Team has completed its tasks and returned to Vienna. The team met with relevant local government officials and stakeholders in the agriculture sector in the four prefectures (Fukushima, Ibaraki, Tochigi and Gunma) most affected by the nuclear emergency in Fukushima. The team were appraised on the local situation and provided relevant technical information.

och IAEA skriver
2. Radiation monitoring

On 3rd April, deposition of both iodine-131 and cesium-137 was detected in 7 prefectures. The values for iodine-131 ranged from 2.4 to 82, for cesium-137 from 5.2 to 57 becquerel per square metre. On 4th April, deposition of iodine-131 was detected in 7 prefectures ranging from 3.1 to 75 becquerel per square metre. Deposition of cesium-137 in 6 prefectures ranging from 7.4 to 46 becquerel per square metre. Reported gamma dose rates in the 46 prefectures showed no significant changes compared to yesterday.

As of 3rd April, iodine-131 and cesium-134/137 was detectable in 8 and 5 prefectures respectively. All values were well below levels that would trigger recommendations for restrictions of drinking water. As of 3rd April, restrictions for infants related to I-131 (100 Bq/l) are in place in only one village of the Fukushima prefecture. The restriction is still in place as a precautionary measure.

Förklara gärna hur du tänker här.
Jag förstår inte skeendet hur de vattenlösliga isotoperna vaskas ur? Kanske en brist hos mig.
Menar du att de med tiden sjunker till botten och att man på så sätt kan rena detta vatten??

Nu är Arnie Gundersen ute i medierna igen, nu i RT, 5 april.

Han kommenterar dumpningen av ”radioaktivt vatten” i havet etc.

Läckan stoppad!

http://dailynews.yahoo.co.jp/fc/domestic/fukushima_nuclear_plant/?1302040781

Artikel på engelska:
http://english.kyodonews.jp/news/2011/04/83392.html

"The outflow of highly radioactive water into the Pacific Ocean from the crippled Fukushima Daiichi nuclear power plant stopped early Wednesday morning after the injection of a chemical agent, Tokyo Electric Power Co. said."

Mycket positivt! Men fortfarande är TEPCO inte av med problemet högradioaktivt vatten på något sätt. Lagret på land kommer att byggas upp hela tiden, för dom måste fortsätta att kyla reaktorerna.

Fortfarande dumpar TEPCO radioaktivt vatten i havet. Nu har dom dumpat 5.600 ton.
http://www3.nhk.or.jp/daily/english/06_10.html

TEPCO är oroliga för en ny explosion:

NHK News Flash: Tokyo Electric Power Company says it will inject nitrogen into the containment vessel of one of its reactors at the Fukushima power plant as early as Wednesday evening to prevent a possible hydrogen explosion.

Förmodligen handlar det om reaktor 2.